I've had some good ones. My last full blown episode was when I was on holiday in Vietname about 5 years ago.
I thought I was a god/spirit who was inhabiting my body (like a vessel) and I could inhabit other vessel's. I literally thought I was inhabiting someone else's body for most of a day and that I was centuries old inhabiting different vessel.
I also came to another belief/realisation regarding bipolar disorder and warrior culture. The vikings had warriors known as beserkers who would go into a manic like frenzy in battle and be largely unstoppable. I was/am a beserker. This is a delusion I hang on to now because I like the idea of it
Speaking of numbers, I became obsessed with the number 304 (my hotel number when I was really sick). I saw it everywhere, it had special meaning, I kept seeking it out. When I got back to Australia and saw my psychiatrist, he crossed of my name at the end of my appointment on his schedule (like a run sheet with all of his patients for the day), said to his receptionist "This one's 304" and wrote the number 304 on the sheet. He still does this at the end of each appointment, I have never mentioned this aspect of my delusion to him, I tripped out when I saw it, but still haven't asked him about it.